uh oh.
I should have probably told you not to update to 4.2.7
greenpois0n and limera1n won't work. Try redsn0w and use the GSM tutorial:
http://forum.ppcgeeks.com/gsm-iphone...sh-thread.html
you would use this firmware during the jailbreak
http://appldnld.apple.com/iPhone4/04...3_Restore.ipsw
let me know if this works, I will update the CDMA jailbreak thread.